pr1mate
Spreadbetting companies price off both the futures markets and also pricing models when the underlying futures market are not open. In the case of the FTSE the futures are open from 8am to 5.30pm compared to 8am to 4.30 for the LSE. Outside of this time the Dax, Dow, S&P, Nikkei, and Hang Seng futures are all open at varying times and are used to price the FTSE 24 hours a day as their is a fairly significant correlation between worldIndicies. As a very rough gague I have noticed that for about every 2 point change in the Dow there is a 1 point change in the FTSE.
